object oriented programming

classes:
a class is a starting point for any object,given the object its characteristics
class is a template defining the method and properties for a new object.


instances:
a new object will be an instants of a class. There can be many instances of a class,each of witch is an object.
For example an employee class can be used to create many instances each of which is an employee object.

object:
dragging a new button from the toolbar onto a form create a new instance.

function overloading:
function overloading creates multiple functions of the same name with different parameters.

polymorphism:
polymorphinsm means code operations or objects can behave in some situations differently by function overloading.

inheritance:
Inheritance is a big port of OOP, allowing a new class inherited from an existing classinsted if writing completely new data members and memebers.

The existing class is called the base class and the new class is a dervided class.

re-usablity:
a base class defines the core

encapsulation:
data members is kept in the class, and they can not be changed in the base class

data binding:
this keeps the data stored in one place through encapsulating.